A Novel and Simple Current Controller for Three-Phase IGBT PWM Power Inverters - A Comparative Study

A new feedback current controller for three-phase pulse width modulated power inverters is presented. To achieve robustness against load parameter variation, fast dynamical response, reduced switching frequency and simple hardware implementation, a three-level hysteresis sliding mode controller is used. The voltage vectors applied to the load are accurately selected in order to minimise the current error. Controller structure based on simple analog-digital hardware is shown and experimental results are presented. The results of a comparative study ilustrate the performance of the proposed controller with other known controllers.